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-rw-r--r--sphinx/application.py6
1 files changed, 0 insertions, 6 deletions
diff --git a/sphinx/application.py b/sphinx/application.py
index 25244ef66..baca1c8f1 100644
--- a/sphinx/application.py
+++ b/sphinx/application.py
@@ -532,12 +532,6 @@ class Sphinx(object):
# special-case for compatibility
if extension == 'rst2pdf.pdfbuilder':
ext_meta = {'parallel_read_safe': True}
- elif extension in builtin_extensions:
- ext_meta = {
- 'version': 'builtin',
- 'parallel_read_safe': True,
- 'parallel_write_safe': True,
- }
try:
if not ext_meta.get('version'):
ext_meta['version'] = 'unknown version'